1. G.I. Barenblatt, Dimensional Analysis (Gordon and Breach Science, New York, 1987)
2. Galileo Galilei, Discorsi e Dimostrazioni Matematiche intorno à due nuoue scienze Attenenti alla Mecanica & i Movimenti Locali (1638)
3. I. Stewart, Does God Play Dice (Penguin, London, 1989), p. 219
4. Tina Komulainen, Helsinki University of Technology, Laboratory of Process Control and Automation. tiina.komulainen@hut.fi
5. J. Sylvan Katz, The Self-Similar Science System. Research Policy 28, 501–517 (1999)